From: Paul Brannan <pbrannan@...>
Date: 2003-01-11T03:07:54+09:00
Subject: Re: iterating in a test

On Sat, Jan 11, 2003 at 01:58:07AM +0900, Nathaniel Talbott wrote:
> How about (untested):
> 
>   10.times { |i|
>     assert_nothing_raised("Testing f where i=#{i}") {
>       assert_equal(1, f(i), "Testing f where i=#{i}")
>     }
>   }

In this case I still have to duplicate the message for the
assert_nothing_raised and the assert_equal call.

What I think I'd like to see is something like this:

  def test_foo
    10.times do |i|
      performing_action("Testing f(x) where i=#{i}") do
        assert_equal 1, f(i)
        some_helper_function(1)
      end
    end
  end

  def some_helper_function(i)
    performing_action("inside the helper function") do
      # make some assertions here
    end
  end

The performing_action() method could append the passed string onto an
array at the start of the block (and remove it at the end), so I have a
list of actions that I'm in the middle of performing.  This list of
actions should be printed for every failed assertion and every exception
that escapes.

I'm not sure where to begin implementing this, though, or whether it's
possible to implement it without modifying Test::Unit.

Paul